Tonights cold open is no different.
Sherlock is brought in to meet the head of the narcotics division.
Sherlock can hardly contain his excitement, and that allows the audience to get all giddy with him.

Credit: Michael Parmelee/CBS
The goal is to infiltrate the headquarters and give someone time to copy files from Farris computer.
Dunning says thats where Farris keeps all of his information about the gangs drug-dealing operation.
She asks Joan to do a background check on him and confirm that everythings aboveboard.
With Dunning murdered, the police have raided the compound and rounded up all the gang members.
The lead suspect is Farris, but once they capture him, they notice he doesnt have a mole.
He agrees to help the cops find the guy, though.
She also gets a book from Fiona.
Its a book of cat-related poems by T.S.
Eliot that Sherlock lent to her, and shes hoping Joan can return it for her.
NEXT: Biker gang double cross
Back at the brownstone, Joan teases Sherlock about his affection for Fiona.
Of course he scoffs at the idea.
When Sherlock watches Hagan walk away, he suspects that she could be Dunnings accomplice.
She has a slight reliance on her right side and is the right height based on the video footage.
So if shes the lead suspect, how did the laptop end up in her hands?
Hagan then double crosses Dunning and makes off with all of the money.
When the detectives find an old warehouse owned by Hagans father, their suspicions are confirmed.
They shot the video at that location, and then Hagan murdered Dunning for the money.
After Fiona stops by to give a gift to Joan, she tells Sherlock how she feels.
Im not typical, she says, to which he quickly replies, I abhor typical.